James b



J. B. GLYNE.

METAL 'SCREW MACHINE.

(No Model.)

No. 876,942. l Patented Jan. 24, 1888.

i UNITED STATES] .AMEs B. CLYNE,

PATENT* OFFICE. 4 v

MACHINE COMPANY, 0E VsAME PLACE.`

METAL-SCREW MACHINE.

SPECIFICATION forming part of Letters Patent No. 376,942, date/d January 24,1888. l y

yApplication filed SeA tember 12, 1837. Serial No. 249.438. (No model.)

especially to the feed mechanism for such ma:` chlnes; and itk consists in certain features of construction andin combination of parts, hereinafter described,and pointed out in the claims.

My present invention is designed as an improvement on ay screw cutting machine for 'which Letters Patent No. 333,198 were granted to me December 29, 1885, and to which refer- I ence is hereby made.

In the accompanying drawings, Figurel is a side elevation, partly in section. Fig. 2 is a side elevation showing the reverse side ofthe feed mechanism. Fig. 3 -is an elevation in transverse sectionon line x rv, Fig. 1. Fig.v 4 is an elevation in longitudinal section showing the feeding-clamp in its closed position for feeding the blank. I

A represents the rear standard of the headblock of the machine, thesamebeingprovided with a suitable box, A', in .which is journaled f hollow spindle a.

their respective seats, so thatthey are adjust-y able endwise, and are heldin their adjusted the rear end of the hollow spindle a', these parts, together with the balance of the machine except the feed mechanism, being sub. vstantially the sameas shown and described in the aforesaid Letters Patent. To the rear side yof standard A, and projecting rearward, is secured' the bracket B, the latter lhaving upwardly-projectinglugs B', in the bore of which are inserted long steel bushingsb, the bores of the bushings being in line with the bore of the These bushings t easily in positions by means of set-screws b. Sleeves f or tubes C and D fit easily in vthe bore of the respective bushings, each sleeve having an ex-` tcrnal head, respectively, C and D. These heads have depending tongues yGland D2, that fit easily in a groove, B2, made longitudinally wise.

0E CLEVELAND, OHIO, AssIGNoR To THE wHiTEsEwiNe Y in thefupper face of the bracket, by means of which the sleeves are held from'turning, but

are left free to move a limited distance end-j The bore of each sleeveis large enough to admit the blank loosely, andthe opposing ends ofthe sleeves are counterbored at c and d to receive the feeding-clamp E. The jaws 'of the clamp are alike, and in making the clamp rst a hollow cylinder is prepared-having a bore ofsuitable size to fit the blank F, theek? Y ternal diameter of the cylinder `being suchas to fit easily in the counterbores c and d.l The ends of the cylinder are made conical externally at e, to it corresponding conical seats, c' and d', at the inner end or bottom of the counterbores/aforesaid. The cylinder is then milled apartthat is, dividedlongitudinallyinto two equal jaws.

When the jaws of clamp E arein the position in the counterboresl 'c and d, bypressing the sleeves toward each other` the conical seats y, c and d', engaging the conical' ends e' of` the clamp, close thejaws of the 'clamp and grasp the blank. VWhen the sleeves are moved apart a trifle, the jaws of the clamp open slightly and leave 4the blank free to revolve between therjaws.

ting the rear lug, B', and the other end'oi` the A spiral spring, G, is coiled around. A lthe 'rear bushing, one end of the spring abutspring abutting head C','the tension of the spring serving to move theengaging head and sleeve forward. f v

For moving the two sleeves rearward against f the action of spring G, I provide the fol1owvhangingrim, H', is mounted on ashaft marked C in the aforesaid patent, said shaft being geared to make one revolution for each screw cut in the machine. The rim H' has a notch ing: A disk, H, havinga rearwardly overf I cut therein, the one side of the notch`h being l an abrupt incline, while the other side of the notch h' has a morergradualslopavas shown in Fig. 1. v I 'n Head D' has one corner cnt away, asshown in Fig. 3,`and`head C' has a' forwardly-pro#- jecting arm, C3, thatvoverlaps head D' and'frts O3 have each, and on the same side, alaterally-f projecting wrist, on which are respectively the anti-friction rolls c2 and d?, for engaging inthe notch of thelatter.l Head D and arm I,

ICO

the edge of disk H. Thev arrangement is such that when the two rollers register vertically, as they would do when both rollers were engaging the fiat edge of rim H', the two sleeves are separated far enough to leave the clamp E loose on the blank, and consequently when the two sleeves engage the ends of the clamp, to cause the jaws of the latter to grasp the blank, the top roller, e2, will be in position slightly forward of the lower roller, d. While disk His making something more than threequarters of a revolution, and during-the time that the screw is being made in the machine, the two rollers are traveling on the fiat surface of rim H', and consequently the two sleeves C and D are held rearward and the spring G remains compressed, and the blank revolves loosely in the clamp.

As a completed screw falls from the machine, the chuck of the machine automatically opens to allow the blank to be moved forward for a new screw, all of which is fully shown and described in the aforesaid patent, and just as the chuck opens the abrupt inclineh comes opposite the rollers c2 and d2. The disk H, moving in the direction indicated by the arrow, first brings the roller c2 in engagement with incline h, and by the recoil of spring G this roller and the connected sleeve is moved forward before roller d2 engages this incline, whereby the clamp is tightened on the blank and the latter is moved forward, not instantaneously, but as fast as roller d2, following after on the incline h, will admit. Theblank is moved forward until the front end thereof strikes a stop had for the purpose in the machine and marked hfin the patent aforesaid. Just after this occurs roller c2 engages incline h', and the roller is thereby moved rearward,thus releasing the clamp,after which the chuck of the machine grasps the blank. The incline h moves the sleeves and clamp slowly rearward until the fiat surface of rim H is reached, after which the clamp remains rearward, open and idle, while the screw is being cut.

What I claim isv 1. In feed mechanism for machinesfor maksleeves toward each other, substantiallyas set forth.

2. The combination, with reciprocating sleeves and clamping-jaws held between the sleeves, substantially as' indicated, of a spring made to engage the rear sleeve for moving the feed mechanism forward and cam-disk for moving the feed mechanism rearward against the action of the spring, substantially as set forth.

3. 'Ihe combination, with a reciprocating sleevegclamping-jaws held between the sleeves, and spring acting against the rear sleeve to move the feed mechanism forward, of camdisk for moving the feed mechanism rearward, said cam-disk having inclines arranged, substantially as indicated, to close the clamps with the forward movementand open the clamps with the rearward movement of the feed mechanism, substantially as set forth.

4. The combination, with reciprocating sleeves, of clamping-jaws and a vspring for normally holding the sleeves in contact with the clamping-jaws.

5. The combination, with reciprocating sleeves having opposing ends counterbored and provided with conical seats, of clamping jaws and a spring for normally holding the sleeves in contact with the clamping-jaws, substantially as set forth.

In testimony whereof I sign this specifica tion, in the presence of two witnesses, this 22d day of July, 1887.

JAMES B. CLYN E.

Vitnesses:

Otras. H. DORER, ALBERT E. LYNCH. 

